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F. E. GROSVOLD'.-

ROOF FLASHING;

APPLICATION FILED FEB. H, \919.

1,317,574. Patented Se t. 30,1919.

l/VI/ENTOR WITNESSES 1]? j j v/gm Jim Z7. drasw/d v -BY ATTORNEYS STATESFATE T FRED E. eRosvoLD, OF EAU CLAIRE, Wiscons n.

ROOF FLASHINGZ To all whom it may concern..-

Be it known that I, FRED E. GRosvoLD, a citizen of the United States,and a resident of Eau Claire, in the county of Eau Claire T theparticular roof to which theflashing is applied.

The present invention is intended more particularly as an improvement onthe flash-'- ing forming the subject matter of an application filed byme August 3rd, 1918, Serial No. 248,195. The present invention in commonwith that of the first application, includes acorrugated tubular bodyrising from the base and flaring toward the base.

The mere provision of corrugations will not afi'ord the capability ofadjustment. Corrugations having their peripheries forming part of thesame cylindrical surface would necessitate a stretching of the metal toconform the flashing 'to thepitch of the roof and at thesame time topresentinteriorly the'necess ary-clearance to accommodate the pipe, andsince the metal will resist stretching, the corrugations would simplybuckle or break. By providing a conical or like downwardly flaringcorrugated flashing the corrugations may be deformed to give theflashing a base line oblique to the axis without the metal beingstretched or the corrugations being buckled or ruptured since thecorrugations in the flaring form, owing to the increasing diameter ofthe corrugations toward the base, permit of the base being disposed at aconsiderable angle to the axis of the flashing and while preserving thenecessary clearance within to receive the pipe.

My present invention provides an important improvement affording themaximum adjustment, the improvement consisting in.

forming the corrugations of the flashing at an angle to the base;thereby possible defor mation of the corrugations without rupturing thesame is increased and the flashing given a rac of adjustment verymatebeyond first ccrrugatiens set in Application filed February 11,1919, S erialNo'. 276,262.

Specification of Letters llatent. Patented sepfij 3Q planes parallelwiththe normaltplanc of the base toithusconform theflashing' to anypitch of roof, and the possibility of adjustment'v is maximized byembodying'said angular corrugations in a truncated conical-or equivalentdownwardly flaring flashing and at about right angles to the pitch ofthe latter. r

.Referenceis to be had-to the accompanying. drawings forming a part] ofvthis. specification, it being understood that thedrawings are merelyillustrative of one example of the invention. I

'Figure 1 is a vertical, section of a roof flashing embodying myinvention'with the axis of the tubular body-perpendicular to theplane'of the base, whereby to adapt the device to a flat roof; -i

Fig. 2 is a side elevation'ofthe. flashing adjusted to accord withtheslant of a roof having a pronounced pitch, part being broken away andotherjsin section, the view showing the device applied; 7 i Fig. 3 is aside elevation of my improved flashing adjusted to accord with the'ridgeor comb of a peak roof; a

Fig. is a diagrammaticlplan view show ing a truncated conical flashingtoprovide the flaretoward the base; J, Fig. 5 is a view similar to Fig.tbut show: ing aflashing with an elliptical base and correspondinglyformed corrugated body.

In carrying'out myinvention in practice the improved flashing is formedwith a flat base 10 from which rises a body 11, said body flaring towardthe base 10. The lower portion of the body 11 is formed withcorrugations 14 extending about the flashing. Above the corrugatedportion the flashing preferably presents an uncorrugated conical zone 12while the extreme upper end may be given any suitable form to fit apipe, the

example illustrated showing a short cylindrical neck 13.

flashing or buckling the corrugations, since V the base may be broughtat a considerable angle to the vertical" axis of .the flashing withoutany stretching strain on theme-te corrugations, .the Widening baseportion permitting'of a- :bo'dily lateral deflection o-f'the 7 Copies ofthis patent may be obtained for fivecnts eal ch by addressing theCommissioner of l'atents,"

; interior for the pipe A."

base" of the flashing; thereby largely con-f tributing-to the amplitude.of deformation Without rupturing or. stretching the metal;

second, owing tothe angular disposition of the corrugations which may bebent downwardly througha considerable angle to a horizontal plane andthen below a horizon tal plane in efl'ecting the adjustment and deiormation} and third, there is an expansion of more; on less of 'theindividual corrugations at the side where they are to; be eX-" panded,all ofwhich gives a rangeofadj ustment of the base line to suit anypitchof roof'B while preserving the'clearance at the i InFig. 2 the:corrugations are compressed v at one side as at 14 and expanded at thedie I, ame-trically opposite side as at 14* While Fig. 3 ithecorrugations are expandedat diametrically opposite sides asat 14 andcompressed at'the intermediate central line, thereby producing a'V-shaped baseto conform to the peak roof.

In the preferred form of my invention, I

provide as in Fig. 2 at the top ofthe flashing, a sleeve 16 havingitsu'pper'edge 17 in-' turned on rounded lines to be received with in theupper end of the pipeA to-whichthe flashing is to be applied. 1 Withinthesleeve 16 and outside'of the upper end "of the 7 neck 13,1 provide al'ead collar-to form a tight. joint with the pipe A.

for truncatedconical-form as indicated in The described flashing may. begenerally i the diagrammatic View, Fig. 4:, to which I have applied thereference characters of Figs. 1 to 8, or, as indicated in Fig. 5 in Ywhich an elliptical base 10 is represented and a correspondingly formedupper body portion including elliptical corrugations 14 'a taperinguncorrugated zone 12 ,.and acylindrical neck.13. V Y

. 'I would statew inflconc'lusionthat while the illustrated exampleconstitutes. a: practical embodiment of my invention, I. do not limitmyself strictly. to the mechanical 'details herein illustrated,since-manifestly the same can be considerably varied withoutdepartureirom the spirit of the invention as de-. lined in theappended'claimsf.- V o 7 o Having thus described myiuinvention, I claimas new, and desire to secure by Letters Patent: i p i 1. A roof flashingtapering upwardly and having corrugations initially and normally atright angles tothe-pitch of the-flashingto incline upwardly from thehorizontal, and.

lie normal .to the taper ofthe interior of the flashing. 7 .2.Arooffiashing ing a normally tapering wall, said wall having a portionthereof formed with annular corrugations initially nor-malto the taperof the wall and thus at approximate right'angles to said tapering wall.

3. A -roof flashingcom-prising a body ing an annular wall, said wallhavin iannular corrugations, said corrugations ing initially andnormally. disposed" at an: "up- Ward inclination to'the horizontal.

" I washington, D; 0.

comprising a body hav-I FRED E. GROSV Q,"v

